package com.nio.netty.groupchat;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

public class GroupChatServer {

    private int port;/*监听端口*/

    public GroupChatServer(int port) {
        this.port = port;
    }

    /*编写run方法，处理客户端的请求*/
    public void run() throws InterruptedException {

        /*创建两个线程组*/
        EventLoopGroup bossGroup = new NioEventLoopGroup(1);
        EventLoopGroup workerGroup = new NioEventLoopGroup();/*   CPU核数*2  */

        try {
            ServerBootstrap serverBootstrap = new ServerBootstrap();
            serverBootstrap.group(bossGroup,workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG,128)
                    .childOption(ChannelOption.SO_KEEPALIVE,true)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            /*获取到pipeline*/
                            ChannelPipeline pipeline = ch.pipeline();
                            /*加入解码器*/
                            pipeline.addLast("decoder",new StringDecoder());
                            /*加入编码器*/
                            pipeline.addLast("encoder",new StringEncoder());
                            /*加入自己的业务处理handler*/
                            pipeline.addLast(new GroupChatServerHandler());

                        }
                    });
            System.out.println("netty 服务器启动成功！");
            ChannelFuture channelFuture = serverBootstrap.bind(port).sync();
            channelFuture.channel().closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }

    public static void main(String[] args)  throws InterruptedException {
        new GroupChatServer(7000).run();
    }


}
